Computer won't connect to internet, need some help?

[thankfulmask424]

I moved my computer into my room so I had to disconnect everything...its hooked up by cable, and I used the exact same cable to reconnect it in my room but now it won't work. I don't get internet, everything turns on though. The router will flash green the first few seconds I turn everything on, but then it continuously flashes red. The modem's lights are green but flicker & the internet light never even flashes on it.

I don't understand what could be wrong, I'm using the same hook up as in the other room, I tried the waiting/turning it on & off, I ttied resetting the router (apparently the modem doesn't have a reset button). Its been hours I can't get it to work!

Im using my phone to ask this question & can't give additional details so I hope that covers it.

Any ideas?